Test your mic in windows.
First open Audio recorder and record yourself. Playback. Sounds good?
Then open command line and type in dxdiag. This opens a window that will check your system and hardware. When its done, go to "Network" sheet and run the Direct Play Voice Options. This will guide you through mic testing.
If both tests come back with a working mic, its should be good to go for AH2.
If you still have trouble, post in Tech Support/Help and Training forum!
Or hook up with a trainer in Training Arena.
PS: What HT means: Make sure your microphone isnt muted in Properties.